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Finding the Third Proportional to 120,639 and 177,445

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Solution

The third proportional to 120,639 and 177,445 is: 260,999.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,639 : 177,445 = 177,445 : x
  2. Step 2: Convert to fraction form
    120,639/177,445 = 177,445/x
  3. Step 3: Cross multiply
    120,639x = 177,445 × 177,445
  4. Step 4: Simplify right side
    120,639x = 31,486,728,025
  5. Step 5: Solve for x
    x = 31,486,728,025/120,639
  6. Step 6: Final answer
    x = 260,999.58

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.